Modify Model set functions to abstract, create Access interactions, do test.

Core/Model.php

@@ -47,4 +47,14 @@ abstract class Model
         }
         return false;
     }
+
+    abstract public function showAll();
+
+    abstract public function showSingle($id);
+
+    abstract public function entry($args);
+
+    abstract public function update($args, $id);
+
+    abstract public function delete($id);
 }